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