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