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