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