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)(15,24)(16,21)(17,27)(18,28)(19,23)(20,25)(22,26)(1,2)(3,4)(6,7)(11,12)(13,15,19,17)(14,20,23,22)(16,25,18,26)(21,27,28,24)(2,4)(5,7,9,6)(8,12,10,11)(13,16,19,18)(14,21,23,28)(15,25,17,26)(20,27,22,24)(5,8,9,10)(6,11,7,12)(13,17,19,15)(14,22,23,20)(16,26,18,25)(21,24,28,27)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.