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