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