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