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