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)(16,23,24,28)(17,22,27,20)(19,26,21,25)(1,2)(3,4)(5,6)(7,12)(8,10)(9,11)(13,15,18,14)(16,21,24,19)(17,20,27,22)(23,26,28,25)(2,4)(5,6)(7,10)(8,12)(9,11)(13,16)(14,19)(15,21)(17,26)(18,24)(20,28)(22,23)(25,27) involution — undirected(6,11)(10,12) 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.