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