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