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