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