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