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