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