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