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)(9,13)(10,11)(12,14)(15,16,20,24)(17,21,25,27)(18,22,28,30)(19,26,29,23)(3,4,5,6)(8,11)(12,13)(17,25)(19,29)(21,27)(23,26)(7,9,10,14)(8,12,11,13)(15,17)(16,21)(18,23)(19,22)(20,25)(24,27)(26,28)(29,30)(3,4)(5,6)(7,8)(9,12)(10,11)(13,14)(15,18)(16,22)(17,26)(19,27)(20,28)(21,29)(23,25)(24,30) involution — undirected(15,19,20,29)(16,23,24,26)(17,22,25,30)(18,27,28,21)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.