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