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