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