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