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