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