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