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