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