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