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