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