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