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