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