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