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