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