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