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