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