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