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