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