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