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