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