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