One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(3,7)(9,10)(11,16)(12,14)(13,15)(17,18,23,27)(19,28,30,25)(20,31,29,22)(21,32,24,26)(1,2,4,5)(3,6,7,8)(17,19)(18,25)(20,24)(21,29)(22,26)(23,30)(27,28)(31,32)(9,11,13,12)(10,14,15,16)(17,20,21,30,23,29,24,19)(18,22,32,28,27,31,26,25)(1,3,4,7)(2,6,5,8)(17,21,23,24)(18,26,27,32)(19,29,30,20)(22,28,31,25)(2,5)(6,8)(9,12,13,11)(10,14,15,16)(17,22,24,25,23,31,21,28)(18,20,26,19,27,29,32,30)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.