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