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