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