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