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