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