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