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