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