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