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