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