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