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)(13,14,20,28,19,23,18,22)(15,24,17,16,21,26,25,27)(5,6)(7,11)(8,10)(9,12)(13,15,19,21)(14,16,23,27)(17,20,25,18)(22,26,28,24)(2,4)(5,7)(6,9)(8,12)(10,11)(13,16)(14,21)(15,23)(17,22)(18,24)(19,27)(20,26)(25,28) involution — undirected(7,12)(9,11)(13,17,18,15,19,25,20,21)(14,16,22,24,23,27,28,26)(6,10)(9,11)(13,18,19,20)(14,22,23,28)(15,17,21,25)(16,26,27,24)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.