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