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