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