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