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