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