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