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