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)(15,16)(17,18)(19,20)(21,22,25,24)(23,27,28,26)(5,7,9,12)(6,10,11,8)(14,18)(16,19)(21,23)(22,26)(24,27)(25,28)(6,11)(7,12)(13,15,17,20)(14,16,18,19)(21,23,25,28)(22,27,24,26)(1,2,3,4)(5,7)(6,10)(8,11)(9,12)(13,15)(14,19)(16,18)(17,20)(21,23)(22,27)(24,26)(25,28)(5,8,9,10)(6,7,11,12)(13,16,17,19)(14,15,18,20)(21,24,25,22)(23,26,28,27)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.