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