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)(13,14,18,19)(15,16,21,24)(17,20,26,27)(22,23,28,25)(1,2,3,4)(13,15)(14,16)(17,22)(18,21)(19,24)(20,23)(25,27)(26,28)(6,9)(10,11)(14,19)(15,21)(20,27)(22,28) involution — undirected(5,6)(7,10)(8,9)(11,12)(13,14)(15,16)(17,20)(18,19)(21,24)(22,23)(25,28)(26,27) involution — undirected(5,7)(6,10)(8,12)(9,11)(13,16)(14,15)(17,25)(18,24)(19,21)(20,28)(22,27)(23,26) involution — undirected(13,17)(14,20)(15,22)(16,23)(18,26)(19,27)(21,28)(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.