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