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