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