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