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