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