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