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