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