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