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