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