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