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