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