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