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