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