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