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