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