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