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