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