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