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