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