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