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)(13,14,18,21,17,20,28,19)(15,22,23,27,24,16,25,26)(5,7,9,6)(8,11,12,10)(13,15,17,24)(14,16,20,22)(18,23,28,25)(19,27,21,26)(1,3,4,2)(5,8,9,12)(6,10,7,11)(14,19)(15,23)(18,28)(20,21)(24,25)(26,27)(6,7)(10,11)(13,16)(14,15)(17,22)(18,27)(19,23)(20,24)(21,25)(26,28) 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.