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