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