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