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