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