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