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