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)(20,26)(21,25)(22,28)(23,29)(24,30)(31,32) involution — undirected(1,2)(3,8)(4,6)(5,7)(9,11)(10,14)(12,16)(13,15)(17,19,24,21)(18,25,30,27)(20,29,31,22)(23,26,28,32)(1,3,5,6)(2,4,7,8)(9,10,13,16)(11,14,15,12)(17,20,24,31)(18,26,30,32)(19,29,21,22)(23,25,28,27)(9,12)(10,15)(11,16)(13,14)(17,21,24,19)(18,27,30,25)(20,22,31,29)(23,32,28,26)(1,2)(3,4)(5,7)(6,8)(9,12)(10,11)(13,14)(15,16)(17,22)(18,28)(19,20)(21,31)(23,30)(24,29)(25,32)(26,27) involution — undirected(1,4)(2,6)(3,7)(5,8)(9,11)(10,14)(12,16)(13,15)(17,23,24,28)(18,29,30,22)(19,26,21,32)(20,25,31,27)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.