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