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