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