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)(14,18)(19,20)(22,27)(23,25)(5,7)(6,11)(8,12)(9,10)(13,14)(15,19)(16,20)(17,18)(21,22,26,27)(23,28,25,24)(5,6,10,8)(7,12,9,11)(13,15,17,16)(14,19,18,20)(21,23,26,25)(22,28,27,24)(1,2)(3,4)(5,8,10,6)(7,12,9,11)(13,14)(15,19)(16,20)(17,18)(21,24)(22,23)(25,27)(26,28)(5,9,10,7)(6,11,8,12)(13,16,17,15)(14,19,18,20)(21,25,26,23)(22,28,27,24)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.