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