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