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