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