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