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