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