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