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