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