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