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