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