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