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