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