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