You must be staying at the Hilton Garden Vacation club.
The idea of taking the shuttle won't work out, because it leaves to late.
http://www.nogodforme.com/images/DSC02260.JPG
It would arrive SWF at about 09:30am, and by the time it got back to USF, it would be 10am. It wouldn't even go back to USF, it would drop you off at one of the onsite hotels, like the HRH, and then you'd have to walk from there.
No, use a cab or limo service so you can arrive the drop off point at 08:00am.
You're in Deerfield, so I assume you are driving your own car up. Just take the car and drive over to USF. If you want to park for free, you can see my site here.
http://www.nogodforme.com/offsite.htm