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