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