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