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