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