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