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