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