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