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