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