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