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