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