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