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