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