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