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