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