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