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