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