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