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