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