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