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