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