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