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