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