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