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