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