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