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