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