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)(19,23)(20,25)(21,29)(22,24)(26,30)(27,32)(28,31) involution — undirected(1,3,6,5)(2,4,7,8)(9,10)(11,15)(12,16)(13,14)(17,19,22,20)(18,23,24,25)(21,27,30,28)(26,31,29,32)(2,7)(4,8)(9,11,13,12)(10,15,14,16)(18,24)(19,20)(26,29)(27,28)(1,4,6,8)(2,3,7,5)(17,18)(19,23)(20,25)(21,26)(22,24)(27,31)(28,32)(29,30)(17,20,22,19)(18,25,24,23)(21,28,30,27)(26,32,29,31)(1,5,6,3)(2,8,7,4)(9,12,13,11)(10,16,14,15)(17,21,22,30)(18,26,24,29)(19,27,20,28)(23,31,25,32)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.