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