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