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