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