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