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