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