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