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