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