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)(11,16)(12,14)(13,15)(17,18,22,25)(19,27,28,30)(20,24,23,32)(21,31,29,26)(2,6)(7,8)(11,12)(14,16)(19,28)(20,23)(24,32)(27,30) involution — undirected(1,3,5,4)(2,7,6,8)(9,11,13,12)(10,14,15,16)(17,19,29,32,22,28,21,24)(18,23,31,30,25,20,26,27)(9,12,13,11)(10,14,15,16)(17,20,22,23)(18,24,25,32)(19,26,28,31)(21,30,29,27)(1,4,5,3)(2,8,6,7)(10,15)(14,16)(18,25)(20,23)(26,31)(27,30)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.