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