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