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