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