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