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