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