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