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