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