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