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