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