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)(15,20)(16,26)(17,21)(18,25)(19,23)(22,27)(24,28)(1,2)(3,4)(6,10)(11,12)(13,15,19,25)(14,20,23,18)(16,21,27,24)(17,22,28,26)(13,16)(14,21)(15,22)(17,20)(18,28)(19,27)(23,24)(25,26) involution — undirected(2,4)(5,7,9,8)(6,11,10,12)(13,17,19,28)(14,22,23,26)(15,24,25,21)(16,20,27,18)(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.