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