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