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