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