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