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