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