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)(11,13)(12,14)(15,16)(17,18,22,24)(19,26,27,32)(20,23,31,30)(21,29,28,25)(1,3,4,8)(2,5,6,7)(9,11)(10,13)(12,15)(14,16)(19,27)(20,31)(23,30)(26,32)(11,15)(13,16)(17,19,28,23,22,27,21,30)(18,20,29,32,24,31,25,26)(2,6)(3,8)(11,15)(13,16)(17,20,22,31)(18,23,24,30)(19,29,27,25)(21,26,28,32)(2,6)(5,7)(10,14)(13,16)(18,24)(20,31)(25,29)(26,32) 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.