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