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