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