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