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