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