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