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