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)(11,15)(12,14)(13,16)(19,23)(22,24)(26,29)(27,31)(1,3,5,7)(2,6,8,4)(9,10,12,14)(11,13,16,15)(18,21)(22,24)(26,29)(27,31)(3,7)(4,6)(9,10,12,14)(11,13,16,15)(17,18,20,21)(19,22,23,24)(25,26)(27,30)(28,29)(31,32)(1,4,5,6)(2,7,8,3)(9,10)(11,13)(12,14)(15,16)(17,19,20,23)(18,22,21,24)(25,27,28,31)(26,30,29,32)(1,2)(3,6)(4,7)(5,8)(9,11)(10,13)(12,16)(14,15) involution — undirectedA 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.