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