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