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)(11,15)(12,13)(14,16) involution — undirected(1,3,5,4)(2,6,8,7)(10,13)(14,15)(18,22)(19,25)(20,27)(23,31)(24,32)(26,29)(28,30)(1,3,5,4)(2,7,8,6)(9,11,12,16)(10,14,13,15)(17,18,21,23)(19,26,28,32)(20,29,27,24)(22,30,31,25)(1,4,5,3)(2,7,8,6)(10,13)(14,15)(18,23)(22,31)(24,29)(26,32)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.