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