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