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