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