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