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