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