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