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