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