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