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