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