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