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