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