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