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