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