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