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