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