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