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