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