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