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