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