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