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