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