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