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