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