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