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