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