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