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