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