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