One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,6)(5,7)(9,10)(11,15)(12,13)(14,16)(17,18,21,19)(20,23,24,22)(25,26,29,27)(28,30,32,31)(1,3,5,6)(2,4,7,8)(9,11,13,16)(10,14,12,15)(25,27,29,26)(28,30,32,31)(9,10,13,12)(11,15,16,14)(17,19,21,18)(20,23,24,22)(25,28)(26,30)(27,31)(29,32)(1,2)(3,4)(5,7)(6,8)(9,11)(10,15)(12,14)(13,16)(17,20)(18,22)(19,23)(21,24) involution — undirected(1,4)(2,6)(3,7)(5,8)(9,12,13,10)(11,15,16,14)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.