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