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