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