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