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