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