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