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