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