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