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