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