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