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)(15,23)(16,26)(17,21)(18,22)(19,27)(20,28)(24,25)(1,2)(3,4)(5,7,8,12)(6,9,10,11)(13,14,18,22)(15,24,20,16)(17,27,19,21)(23,26,28,25)(2,4)(13,15,18,20)(14,16,22,24)(17,26,19,25)(21,28,27,23)(6,10)(7,12)(13,16)(14,20)(15,22)(17,23)(18,24)(19,28)(21,26)(25,27) involution — undirected(13,17,18,19)(14,21,22,27)(15,25,20,26)(16,23,24,28)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.