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