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