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