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