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