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