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