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