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