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