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