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