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