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