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