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