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