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