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