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