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