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