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