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