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