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