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