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