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