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