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