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