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