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