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