Have at least TWO classes you can talk about. Handouts work. They don't have to be detailed—in a sense a sketch is better since you can fill it in more easily. Don't get lost in details. Use a basic ikebana style approach. Let them know about ONE thing your students will take away from each class.
(1) intro 101 style class in your field or in your department's main discipline
(2) specialized “dream” type advanced elective
Then (if necessary)
(3) graduate class
Be ready to talk about how your research works in your teaching. This is a chance for you to show how you will meet their needs.
Here's something to chew on: how would you handle a large lecture class (100 plus people)?