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