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