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