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