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