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