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