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)(1,3,5,4)(2,6,8,7)(11,16)(13,15)(17,18,22,25)(19,23,27,30)(20,29,24,21)(26,32,31,28)(9,11,12,16)(10,13,14,15)(17,19,22,27)(18,23,25,30)(20,26,24,31)(21,28,29,32)(10,14)(13,15)(17,20,21,18,22,24,29,25)(19,26,28,23,27,31,32,30)(1,4,5,3)(2,7,8,6)(19,27)(23,30)(26,31)(28,32)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.