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