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