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