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