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