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