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)(16,23)(20,28)(22,26)(24,27)(1,2,4,3)(5,7)(6,9)(8,11)(10,12)(13,14)(15,19)(16,24)(17,25)(18,21)(20,22)(23,27)(26,28)(6,10)(7,11)(13,15,18,17)(14,19,21,25)(16,22,23,26)(20,27,28,24)(6,10)(9,12)(13,16,18,23)(14,20,21,28)(15,22,17,26)(19,27,25,24)(1,3,4,2)(13,15,18,17)(14,19,21,25)(16,22,23,26)(20,27,28,24)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.