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