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