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