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