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