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