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