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