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