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