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