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