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