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)(21,26)(22,23)(24,25)(27,28)(29,32)(30,31) involution — undirected(6,8)(9,10,13,16)(11,14,12,15)(18,23)(19,25)(26,31)(27,32)(5,6)(7,8)(9,11,13,12)(10,14,16,15)(17,19)(18,24)(20,23)(21,27)(22,25)(26,29)(28,31)(30,32)(1,2)(3,4)(9,10)(11,14)(12,15)(13,16)(17,20,22,24)(18,25,23,19)(21,29,30,28)(26,27,31,32)(9,12,13,11)(10,15,16,14)(17,21,22,30)(18,26,23,31)(19,27,25,32)(20,28,24,29)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.