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