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