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