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