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