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