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