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