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