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