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