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