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