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