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