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