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