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