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