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