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