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