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