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