Hi Kathy!
This is a great question and a great idea!
The official Disney World website offers some insight into Resort transportation on their
Complimentary Transportation page. Be sure to request a transportation guide when you check in your resort.
There are also some other super-helpful sites offering more of a chart that you are looking for. Keep in mind, though, that these are not official Disney sites, so they could be outdated. But, it may help you in your planning! (Isn't planning a lot of fun??!!) You can copy and paste the links below:
http://www.mouseplanet.com/dtp/wdwguide/5_Primer/wdw_transportation/overview.htm
http://www.intercot.com/infocentral/transportation/gettingaround.asp
http://disneygeek.com/wdw/transportation/trans_main.php
Additionally, you can find some really good Disney planning books that have some great transportation and planning tools. The Passporter series and Unofficial Guides are my favorite.
I hope this helps! Please let me know if you have any other questions.