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