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