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