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