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