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