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