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