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)(15,19)(18,20)(21,22)(23,27)(24,25)(26,28)(6,11)(9,12)(13,14,17,16)(15,18,19,20)(21,23,25,28)(22,26,24,27)(5,7,10,8)(6,9,11,12)(13,15)(14,18)(16,20)(17,19)(21,23)(22,26)(24,27)(25,28)(1,2)(3,4)(5,8,10,7)(6,9,11,12)(13,15)(14,18)(16,20)(17,19)(21,24,25,22)(23,27,28,26)(5,9)(6,8)(7,11)(10,12)(13,16,17,14)(15,20,19,18)(21,23)(22,27)(24,26)(25,28)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.