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