One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(17,18,24,28)(19,21,26,31)(20,30,29,25)(22,27,23,32)(2,5)(6,8)(9,10)(11,14)(12,13)(15,16)(17,19,23,29,24,26,22,20)(18,25,27,21,28,30,32,31)(1,3,4,7)(2,6,5,8)(10,13)(11,15)(17,20,23,19,24,29,22,26)(18,21,27,30,28,31,32,25)(9,11,12,15)(10,14,13,16)(17,21)(18,26)(19,28)(20,27)(22,25)(23,30)(24,31)(29,32)(10,13)(14,16)(17,22,24,23)(18,27,28,32)(19,20,26,29)(21,30,31,25)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.