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