Hi Natalie,
Unfortunately what you're looking for doesn't really exist. Disney has not put out a full transportation map or schedule in many, many years. However, I do have a few alternatives for you.
First, you may want to look at the
Disney graphic map to show you the relative position of the parks and resorts.
You may also want to visit the independent website ourlaughingplace.com. They have a tool called the "Transportation Wizard" which will give you all the possible transportation options after you input point A and point B.
Another alternative is to run a Google search for "Arthur de Wolf" and Disney map. Mr. de Wolf is an artist and Disney fan who has created his own map of the WDW transportation routes. It's quite masterful, in my opinion. He has options to download the map, which you may find helpful.
Good luck with your planning. Please let us know if you have additional questions.