What will it take to perform this task? What kind of person is this company looking for?
It will require good communication and interpersonal skills, and the ability to interface with a diverse group of people and levels. If these are your areas of strength, focus on letting the interviewer know that you have the ability and experience to interface well with many different groups.
Like the speechwriter, you want your audience to remember the important points you have made. By concentrating on a handful of strengths, you will find that you are more focused and succinct about telling what you have to offer. More importantly, the folks you meet are more likely to remember you for your strengths.