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