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