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