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