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