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)(17,18,22,25)(19,26,28,31)(20,24,21,29)(23,30,32,27)(1,3,5,4)(2,7,6,8)(10,14)(11,16)(17,18)(19,23)(20,29)(21,24)(22,25)(26,27)(28,32)(30,31)(10,14)(13,15)(17,19,22,28)(18,23,25,32)(20,27,21,30)(24,31,29,26)(1,4,5,3)(2,7,6,8)(10,14)(13,15)(17,20,22,21)(18,24,25,29)(19,27,28,30)(23,31,32,26)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.