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)(15,21,26,20,24,28,16,25)(2,4)(5,6,8,9)(7,10,11,12)(13,15)(14,20)(16,17)(18,26)(19,24)(21,27)(22,28)(23,25)(6,9)(7,11)(13,16,19,26)(14,21,23,28)(15,17,24,18)(20,27,25,22)(5,7)(6,10)(8,11)(9,12)(13,17,19,18)(14,22,23,27)(15,16,24,26)(20,28,25,21)(6,9)(7,11)(14,23)(20,25)(21,28)(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.