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