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