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