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