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