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