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