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