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