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