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