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