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