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