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