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