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