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