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