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