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