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