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