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