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