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)(17,18,20,24,22,26,21,25)(19,23,29,32,27,31,28,30)(1,3,5,4)(2,6,8,7)(9,11,16,15,12,10,13,14)(17,19,20,29,22,27,21,28)(18,23,24,32,26,31,25,30)(10,14)(11,15)(13,16)(18,24)(19,27)(20,21)(23,30)(25,26)(31,32) involution — undirected(1,4,5,3)(2,7,8,6)(10,11)(14,15)(17,20,22,21)(18,24,26,25)(19,28,27,29)(23,30,31,32)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.