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