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