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