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