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