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