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