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