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)(17,18,21,20)(19,24,28,23)(22,25,31,30)(26,29,32,27)(1,3,5,4)(2,6,8,7)(9,11,13,12)(10,14,15,16)(17,19)(18,23)(20,24)(21,28)(22,27)(25,32)(26,30)(29,31)(1,3,5,4)(2,7,8,6)(10,15)(14,16)(17,20,21,18)(19,26,28,32)(22,25,31,30)(23,27,24,29)(9,12,13,11)(10,16,15,14)(17,19)(18,24)(20,23)(21,28)(22,27)(25,26)(29,31)(30,32)(1,4,5,3)(2,6,8,7)(19,27)(22,31)(23,32)(24,26)(25,30)(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.