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