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