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