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)(14,18)(16,20)(21,22,26,25)(23,28,24,27)(6,8)(10,12)(13,14)(15,16)(17,18)(19,20)(21,22,26,25)(23,27,24,28)(1,3,4,2)(7,11)(10,12)(14,18)(15,19)(21,23,26,24)(22,27,25,28)(5,7,9,11)(6,10,8,12)(13,15,17,19)(14,16,18,20)(21,24,26,23)(22,28,25,27)(5,8,9,6)(7,12,11,10)(13,16)(14,19)(15,18)(17,20)(21,25,26,22)(23,28,24,27)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.