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