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