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)(13,14,17,19)(15,20,18,16)(23,27)(26,28)(5,6)(7,9)(8,10)(11,12)(13,14)(15,16)(17,19)(18,20)(22,25)(26,28) involution — undirected(7,12)(9,11)(13,15,17,18)(14,16,19,20)(21,22)(23,26)(24,25)(27,28)(1,2)(3,4)(5,7,8,12)(6,9,10,11)(13,14)(15,16)(17,19)(18,20)(5,6)(7,11)(8,10)(9,12)(13,16)(14,18)(15,19)(17,20)(21,23)(22,26)(24,27)(25,28) 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.