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