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