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