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)(17,18,22,20)(19,25,28,32)(21,29,31,24)(23,30,26,27)(2,5)(3,7)(9,10)(11,14)(12,13)(15,16)(17,18,22,20)(19,26,28,23)(21,24,31,29)(25,27,32,30)(1,3,4,7)(2,6,5,8)(10,13)(14,16)(17,19)(18,23)(20,26)(21,30)(22,28)(24,32)(25,29)(27,31)(2,5)(6,8)(10,13)(14,16)(17,20,22,18)(19,26,28,23)(21,29,31,24)(25,27,32,30)(9,11,12,15)(10,14,13,16)(18,20)(23,26)(24,29)(25,32)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.