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