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