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