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)(14,17)(15,19)(21,22)(23,25)(24,28)(26,27)(5,7,10,9)(6,11,12,8)(14,17)(18,20)(22,27)(23,24)(6,12)(7,9)(13,14)(15,18)(16,17)(19,20)(21,23,26,24)(22,25,27,28)(1,2,3,4)(5,8)(6,7)(9,12)(10,11)(13,14)(15,18)(16,17)(19,20)(21,24,26,23)(22,25,27,28)(5,9,10,7)(6,8,12,11)(13,15,16,19)(14,18,17,20)(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.