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