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