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