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