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