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