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