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