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