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