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