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