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