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