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