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