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