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