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