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