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