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