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