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