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