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