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