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