One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10)(11,16)(12,14)(13,15)(17,18,23,29)(19,22,28,25)(20,26,30,32)(21,31,24,27)(1,3)(2,5)(4,8)(6,7)(17,19,23,28)(18,25,29,22)(20,21,30,24)(26,27,32,31)(9,11,13,12)(10,14,15,16)(17,20,24,19,23,30,21,28)(18,26,27,22,29,32,31,25)(2,6)(5,7)(17,21,23,24)(18,27,29,31)(19,30,28,20)(22,26,25,32)(3,8)(5,7)(9,12,13,11)(10,14,15,16)(17,22,21,26,23,25,24,32)(18,28,31,30,29,19,27,20)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.