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