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