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