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