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