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