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