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