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