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