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