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