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