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