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