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