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)(11,16)(12,14)(13,15)(18,22)(19,25)(21,28)(23,31)(26,32)(27,29) involution — undirected(2,5)(6,8)(9,11,13,12)(10,14,15,16)(17,18)(19,26)(20,22)(21,24)(23,27)(25,31)(28,30)(29,32)(11,12)(14,16)(17,19,20,27)(18,23,22,26)(21,29,28,25)(24,31,30,32)(1,3,4,7)(2,6,5,8)(9,12,13,11)(10,14,15,16)(18,22)(19,27)(24,30)(25,29)(11,12)(14,16)(18,22)(23,26)(24,30)(31,32) 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.