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