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)(10,14)(11,13)(15,16)(19,26)(20,21)(23,27)(24,30)(28,29)(31,32) involution — undirected(2,6)(4,12)(7,13)(8,9)(11,16)(14,15)(17,18)(19,27)(20,24)(21,30)(22,25)(23,29)(26,31)(28,32) involution — undirected(1,3,5,10)(2,7,9,14)(4,11,12,16)(6,13,8,15)(17,19)(18,23)(20,29)(21,26)(22,28)(24,32)(25,31)(27,30)(3,10)(7,14)(11,16)(13,15)(19,28)(23,31)(26,29)(27,32) 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.