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