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