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