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)(13,14,19,21)(15,22,17,20)(16,25,26,18)(23,24,27,28)(1,2)(3,4)(6,9)(10,11)(13,15,19,17)(14,20,21,22)(16,23,26,27)(18,24,25,28)(5,6)(7,10)(8,9)(11,12)(14,21)(18,25)(20,22)(24,28) involution — undirected(5,7)(6,10)(8,12)(9,11)(13,16)(14,18)(15,23)(17,27)(19,26)(20,24)(21,25)(22,28) involution — undirected(13,17,19,15)(14,20,21,22)(16,23,26,27)(18,28,25,24)(13,18)(14,16)(15,24)(17,28)(19,25)(20,23)(21,26)(22,27) 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.