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