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