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