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