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