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)(11,15)(12,16)(13,14)(17,18,21,23)(19,25,27,20)(22,24,30,32)(26,28,31,29)(1,3)(2,5)(4,8)(6,7)(18,23)(19,26)(20,28)(22,30)(25,29)(27,31) involution — undirected(2,6)(5,7)(10,14)(15,16)(17,19)(18,20)(21,27)(22,31)(23,25)(24,28)(26,30)(29,32) involution — undirected(2,6)(5,7)(9,11,13,12)(10,15,14,16)(18,23)(20,25)(24,32)(28,29)(3,8)(5,7)(9,12,13,11)(10,16,14,15)(17,20)(18,19)(21,25)(22,28)(23,27)(24,31)(26,32)(29,30)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.