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