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)(15,16,18,20)(17,24,25,30)(19,21,27,23)(22,26,29,28)(3,4)(5,6)(7,9)(8,12)(10,13)(11,14)(16,20)(17,25)(21,23)(26,28) involution — undirected(4,6)(7,10,11,12)(8,9,13,14)(16,21)(19,27)(20,23)(22,30)(24,29)(26,28)(8,13)(9,14)(15,17,18,25)(16,22,20,29)(19,28,27,26)(21,30,23,24)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.