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