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