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