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