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