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