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