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