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