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