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