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