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