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