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