The interview starts as soon as you enter the door of Swiss Re: dress appropriately, keep your head up, smile, be polite, offer a firm handshake and remember eye contact. Write down names - preferably know them before hand and the titles. This is something HR must tell you and it shows interest.
Questions depends on the function. Will you work in a team, do you have deadlines, do you work with people remotely, is it technical or people oriented etc.
Be prepared for things like Where are you in 5 years, are you a social person, how will you approach a certain problem, how do you prioritize your tasks, what do you know about Swiss Re etc. There are millions of directions an interview can go.
The cool thing is that you can influence it with your answers and your own questions - remember that most likely the person you are meeting is not doing this everyday either (again depending on function).
One very important thing is to back up very thing up you say with examples. Talk is cheap and if you can not back your statements up with examples from your studies, work life or private life, they are not worth a lot. Just think hard about it before you go and write some stories down (10 are ok, 20 enough, 50 great - will cover all bases)
And prepare questions. Preferably a lot. And try to know as much about the company as you can dig up. Read the annual report, google management, find recent news about them.
And you must be able to answer the question: 'tell me about yourself' in 2 minutes minutes in a clear and concise way. Read your CV thoroughly and tell the story so it makes sense in relation to the position.
And finally prepare a 30 sec exit statement for when they ask if you would like to add anything else. Don't say no to that question - this is where you nail it.
Good luck - interviewing is not easy to begin with and only experience will make you more relaxed, so don't freak out about it. And remember to be yourself!