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